Full immersion with distortions Unless you build a half spherical screen where your eyes are in all directions the same distance to the screen distortion will occur. For half spherical displays you also have the problem that nearly no game supports the FOV settings you need for that.

Still if we talk about immersion. I would love to have a domed huge screen. but not a curved one...

all the videos show a distorted image until they mash the camera into the intended viewer position then you see full immersion. It's crap if you're constantly moving around, but with a panel that is only curved on one axis that won't be as much of an issue.